1C in Russia owns the game, steam support sends you to Aspyr thru their help pages, than Aspyr says not their game it's 1C, I have tried to explain to Steam Support, lost cause. I have the same issue you described. no one cares at steam, contact valve who owns steam. I am.

Begin the level anew, save, and try to use another tunnel to cross ( the part with right or left options) and continue the level. If one game crash reaload and use the other tunnel. Its the most common error in the tank level.

I can go thru without even getting hurt or low on health, when I go up to the gate to get out everything except sound-objects key bindings, but no page frame to view, so how do you know where you are at by the gate? No issue's on any other new or older games, people do not like vista but I have no issue's except games that are written wrong for vista and even though, the vendor is making his money, By the way clearly states "vista when buying acceptable". I just say any vista users playing this game thru? What changes if at all to play all the way thru?